I would be worried about a couple of things:
It might be hard to cut out clean-edged shapes out of fairly thick cookies, and thinner cookie bars might break when you attempt to cut.
The cookies you cut out will probably be quite thick/heavy, and it may be hard to get them to attach to a stick and not fall off.
I've never tried it, though, so it might work.
RP
Bar cookies would probably rise alot more than regular sugar cookies.
I have made mini chocolate chip cookies on sticks before to add into a decorated cookie bouquet .... you could probably use different recipes as long as you don't make them overly large. Mine were about 1.5"-2" diameter.
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